Akar Kessel's Dark Shard

This amulet is fashioned from a single shard of resilient extraplanar material originating from the realm of a unknown eldritch god from the negative plane. While you are holding it, you gain the following benefits and :

• You can use the amulet as a spell casting focus for your spells.
• You can try to cast a cantrip that you don’t know. The cantrip must be on your spell list, and you must make a DC 15 Intelligence Arcana check. If the check succeeds, you cast the spell. If the check fails, so does the spell, and the action used to cast the spell is wasted. In either case, you can’t use this property again until you finish a long rest.
• You gain the arms of Hadar spell
• you gain resistance to necrotic damage
• you slowly loose your grip on sanity and reality, make a DC 16 Intelligence saving throw or loose one of your total 1d6+4 sanity points, if you loose all of them you loose sanity and give into the shard doing its bidding.

• Arms Of Hadar Source: Player's Handbook

  1st-level conjuration

  Casting Time: 1 action
  Range: Self (10-foot radius)
  Components: V, S
  Duration: Instantaneous

  You invoke the power of Hadar, the Dark Hunger. Tendrils of dark energy erupt from you and batter all creatures within 10 feet of you. Each creature in that area must make a Strength saving throw. On a failed save, a target takes 2d6 necrotic damage and can’t take reactions until its next turn. On a successful save, the creature takes half damage, but suffers no other effect.

  At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 1st.

   

Notes: warlock